diff --git a/flag.go b/flag.go
index 083cd50..9b4e2a2 100644
--- a/flag.go
+++ b/flag.go
@@ -41,8 +41,12 @@ func (c *flagConfig) Options() config.Options {
 }
 
 func (c *flagConfig) Init(opts ...options.Option) error {
+	var err error
+
 	for _, o := range opts {
-		o(&c.opts)
+		if err = o(&c.opts); err != nil {
+			return err
+		}
 	}
 
 	if err := config.DefaultBeforeInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
diff --git a/util.go b/util.go
index 8f9c704..4dba12b 100644
--- a/util.go
+++ b/util.go
@@ -325,6 +325,7 @@ func (c *flagConfig) flagFloat64(v reflect.Value, fn, fv, fd string) error {
 	return nil
 }
 
+/*
 func (c *flagConfig) flagStringSlice(v reflect.Value, fn, fv, fd string) error {
 	nv, ok := v.Addr().Interface().(*string)
 	if !ok {
@@ -333,6 +334,7 @@ func (c *flagConfig) flagStringSlice(v reflect.Value, fn, fv, fd string) error {
 	flag.StringVar(nv, fn, fv, fd)
 	return nil
 }
+*/
 
 func getFlagOpts(tf string) (string, string, string) {
 	var name, desc, def string